Sectional ring grinder



' June 3, 1930. G. E. VANCE L 1 SEGTIONAL RING GRINDER Filed Jan. 16,1928 Patented June 3, 1930 UNITED STATES PATENT OFFICE GEORGE E. VANCE,OF SPRINGFIELD, OHIO, ASSIGNOR TO THE SAFETY GRINDING WHEEL & MACHINECOMPANY, OF SPRINGFIELD, OHIO, A CORPORATION OF OHIO SECTIONAL RINGGRINDER Application filed January 16, 1928. Serial No. 247,006.

My invention relates to sectional grinding wheels which are made in theform of a ring grinder and in which the segments are secured firmlytogether by means which will 6 resist the strains tending to displacethe segments in use, particularly in an axial direction.

My invention relates particularly to improvements in the ring grindershown in my 1 prior Patent No. 1,642,096 of September 13,

The invention consists in the constructions and combinations and partshereinafter described and pointed out in the claims.

In the accompanying drawings:

Fig. 1 is a side elevation partly in section of my sectional grindingwheel.

Fig. 2 is an end view of the same.

I Figs. 3, 4, 5, 6 and 7 are detail views of the various sectional partsshowing the manner of joining the sections together.

Figs. 8 and 9 are respectively a side elevation and detail ofamodification.

The ring grinder is made up of a series of segments 1, 1 1*, etc. ofarcuate form and having on their outer periphery grooves 2.

The segments extend the full length of the grinding element so that themeeting lines between the same are parallel to the axis of rotation.These segments are formed at their respective ends with interengagingparts or lugs and when assembled they are held in position by suitablemetal clamping devices 3 which lie wholly within the grooves 2.

The individual sections are formed at their ends with interengagingparts in the nature of lugs 4 preferably of a truncated cone form andcorresponding recesses 4 which are fitted together prior to the timethat the clamping devices are inserted in the peripheral grooves. lVhenthe sections are thus interlocked they are held against independentmovement radially and axially.

There is also preferably provided at one end of the assembled ring thegroove 5 in which is located a metal ring 6 which can be secured intothe groove by cementing it therein by sulphur or some suitable cement.

In some instances I preferably provide intermediate or spacing sections7 which fit between the sections 1, 1 1", etc. as shown more clearly inFigs. 5 and 6. When these intermediate spacing sections are used theyare preferably made of somewhat softer material than the main sectionsso that in use a clearance space is provided between the segments. lVhenthese spacing segments are used they are provided on the side with lugsor recesses to fit in corresponding recesses or lugs on the mainsegments. By the use of these segments having interengaging parts on theclamping devices and peripheral grooves on the surface of the ring Iprovide a ring in which the segmental parts are held firmly againstdisplacement both radially and axially.

This type of grinder is generally used for grinding surfaces or otherparts where the end of the cylindrical ring or wheel is used for thegrinding action and as it is worn away to one of the peripheral groovesthe clamping parts may be removed and a new grinding surface presented.By preventing independent axial movement of the segments in the mannerdescribed an unbroken grid- 3 ing surface is insured.

Figs. 8 and 9 illustrate a modification in which the engaging parts areformed in the nature of serrations or V-shaped ribs 3 extendinglongitudinally of the segments and engaging with corresponding V-shapedrecesses or grooves 4 in the adjacent segments or parts.

Having now described my invention what I claim as new and desire tosecure by Letters Patent is:

1. A grinding wheel having a series of seg ments, the meeting lines ofwhich extend parallel to the axis of the wheel, means for holding saidsegments against radial dis-* placement, and means for holding saidsegments against axial displacement relatively to each other consistingof overlapping radially-disposed faces between said segments to preventindependent axial displacement ofthe segments.

2. A grinding wheel having a series of segments assembled in ring formwith a meeting line between the segments extended in an axial direction,means for holding saidsegments against radial displacement, andinterlocking parts between the meeting edges of said segments consistingof truncated coneshaped members engaging corresponding re- 5 cesses inthe adjacent segments.

In testimony whereof, I hereunto set my hand this 10th day of January,1928.

GEORGE E. VANCE.

